Folding chair



FIG. 1 is a front-elevational view of a folding chair, showing my new design;

FIG. 2 is a rear-elevational view thereof;

FIG. 3 is a left-side-elevational view thereof;

FIG. 4 is a right-side-elevational view thereof; and

FIG. 5 is a top-plan view thereof. 

The ornamental design for a folding chair, as shown. 